Tis very true! Colors are fun!, especially with a business suit. I tend to wear black suits, so my red and silver small Timbuk2 mixes it up a little.

Funny you should mention the small not being very small MP. I used to think it was perfect for the kitchen sink I seem to carry. And then I started bringing my lunch to work as well... had to upgrade to medium! Went with the billboard one in black and it has all kinds of stickers . Very professional